package com.plusesb.config.ueditor;

import com.plusesb.config.ueditor.define.ActionMap;
import org.apache.commons.io.IOUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;


/**
 * 配置管理器
 * @author hancong03@baidu.com
 *
 */
public final class ConfigManager {

//	private final String rootPath;
//	private final String originalPath;
//	private final String contextPath;
	private static final String configFileName = "/ueditor/config.json";
	private String parentPath = null;
	private JSONObject jsonConfig = null;
	// 涂鸦上传filename定义
	private final static String SCRAWL_FILE_NAME = "scrawl";
	// 远程图片抓取filename定义
	private final static String REMOTE_FILE_NAME = "remote";

//	/*
//	 * 通过一个给定的路径构建一个配置管理器， 该管理器要求地址路径所在目录下必须存在config.properties文件
//	 */
//	private ConfigManager ( String rootPath, String contextPath, String uri ) throws FileNotFoundException, IOException {
//
//		rootPath = rootPath.replace( "\\", "/" );
//
//		this.rootPath = rootPath;
//		this.contextPath = contextPath;
//		this.originalPath = "src/main/resources/ueditor/config.json";
//
//		this.initEnv();
//
//	}
//
//	/**
//	 * 配置管理器构造工厂
//	 * @param rootPath 服务器根路径
//	 * @param contextPath 服务器所在项目路径
//	 * @param uri 当前访问的uri
//	 * @return 配置管理器实例或者null
//	 */
//	public static ConfigManager getInstance ( String rootPath, String contextPath, String uri ) {
//
//		try {
//			return new ConfigManager(rootPath, contextPath, uri);
//		} catch ( Exception e ) {
//			return null;
//		}
//
//	}


	public ConfigManager() {
		try {
			this.initEnv();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	// 验证配置文件加载是否正确
	public boolean valid () {
		return this.jsonConfig != null;
	}
	
	public JSONObject getAllConfig () {
		
		return this.jsonConfig;
		
	}
	
	public Map<String, Object> getConfig ( int type ) throws JSONException {
		
		Map<String, Object> conf = new HashMap<String, Object>();
		String savePath = null;
		String localSavePathPrefix = null;
		
		switch ( type ) {
		
			case ActionMap.UPLOAD_FILE:
				conf.put( "isBase64", "false" );
				conf.put( "maxSize", this.jsonConfig.getLong( "fileMaxSize" ) );
				conf.put( "allowFiles", this.getArray( "fileAllowFiles" ) );
				conf.put( "fieldName", this.jsonConfig.getString( "fileFieldName" ) );
				savePath = this.jsonConfig.getString( "filePathFormat" );
				break;
				
			case ActionMap.UPLOAD_IMAGE:
				conf.put( "isBase64", "false" );
				conf.put( "maxSize", this.jsonConfig.getLong( "imageMaxSize" ) );
				conf.put( "allowFiles", this.getArray( "imageAllowFiles" ) );
				conf.put( "fieldName", this.jsonConfig.getString( "imageFieldName" ) );
				savePath = this.jsonConfig.getString( "imagePathFormat" );
				localSavePathPrefix = this.jsonConfig.getString("localSavePathPrefix");
				break;
				
			case ActionMap.UPLOAD_VIDEO:
				conf.put( "maxSize", this.jsonConfig.getLong( "videoMaxSize" ) );
				conf.put( "allowFiles", this.getArray( "videoAllowFiles" ) );
				conf.put( "fieldName", this.jsonConfig.getString( "videoFieldName" ) );
				savePath = this.jsonConfig.getString( "videoPathFormat" );
				localSavePathPrefix = this.jsonConfig.getString("localSavePathPrefix");
				break;
				
			case ActionMap.UPLOAD_SCRAWL:
				conf.put( "filename", ConfigManager.SCRAWL_FILE_NAME );
				conf.put( "maxSize", this.jsonConfig.getLong( "scrawlMaxSize" ) );
				conf.put( "fieldName", this.jsonConfig.getString( "scrawlFieldName" ) );
				conf.put( "isBase64", "true" );
				savePath = this.jsonConfig.getString( "scrawlPathFormat" );
				break;
				
			case ActionMap.CATCH_IMAGE:
				conf.put( "filename", ConfigManager.REMOTE_FILE_NAME );
				conf.put( "filter", this.getArray( "catcherLocalDomain" ) );
				conf.put( "maxSize", this.jsonConfig.getLong( "catcherMaxSize" ) );
				conf.put( "allowFiles", this.getArray( "catcherAllowFiles" ) );
				conf.put( "fieldName", this.jsonConfig.getString( "catcherFieldName" ) + "[]" );
				savePath = this.jsonConfig.getString( "catcherPathFormat" );
				localSavePathPrefix = this.jsonConfig.getString("localSavePathPrefix");
				break;
				
			case ActionMap.LIST_IMAGE:
				conf.put( "allowFiles", this.getArray( "imageManagerAllowFiles" ) );
				conf.put( "dir", this.jsonConfig.getString( "imageManagerListPath" ) );
				conf.put( "count", this.jsonConfig.getInt( "imageManagerListSize" ) );
				break;
				
			case ActionMap.LIST_FILE:
				conf.put( "allowFiles", this.getArray( "fileManagerAllowFiles" ) );
				conf.put( "dir", this.jsonConfig.getString( "fileManagerListPath" ) );
				conf.put( "count", this.jsonConfig.getInt( "fileManagerListSize" ) );
				break;
				
		}
		
		conf.put( "savePath", savePath );
		conf.put( "localSavePathPrefix", localSavePathPrefix );
//		conf.put( "rootPath", this.rootPath );

		return conf;
		
	}
	
	private void initEnv () throws IOException {

		InputStream in = this.getClass().getResourceAsStream(configFileName);

		String configContent = IOUtils.toString(in, "UTF-8");
		try{
			JSONObject jsonConfig = new JSONObject( configContent );
			this.jsonConfig = jsonConfig;
		} catch ( Exception e ) {
			this.jsonConfig = null;
		}
		
	}
	
//	private String getConfigPath () {
//		return this.parentPath + File.separator + ConfigManager.configFileName;
//	}

	private String[] getArray ( String key ) throws JSONException {
		
		JSONArray jsonArray = this.jsonConfig.getJSONArray( key );
		String[] result = new String[ jsonArray.length() ];
		
		for ( int i = 0, len = jsonArray.length(); i < len; i++ ) {
			result[i] = jsonArray.getString( i );
		}
		
		return result;
		
	}
	
	// 过滤输入字符串, 剔除多行注释以及替换掉反斜杠
	private String filter ( String input ) {
		
		return input.replaceAll( "/\\*[\\s\\S]*?\\*/", "" );
		
	}
	
}
